Patents by Inventor Chitoshi MIKI
Chitoshi MIKI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11958063Abstract: Damage caused by displacement of a rotating shaft is prevented with an acceleration sensor. A centrifuge according to the present invention includes a rotor, a driving source that rotates the rotor, a rotating shaft that links the rotor with the driving source, an acceleration sensor, and a control unit. The acceleration sensor outputs a value indicating acceleration in at least two different directions which are orthogonal to an axial direction of the rotating shaft. The control unit obtains a displacement conversion value corresponding to a value, which is obtained by dividing a value which is proportional to acceleration based on a value indicating acceleration and outputted by the acceleration sensor, by a value which is proportional to a square of an angular velocity of the rotor, and stops rotation of the rotor when the displacement conversion value satisfies a displacement determination criterion which is predetermined and indicates that displacement is large.Type: GrantFiled: January 10, 2019Date of Patent: April 16, 2024Assignee: KUBOTA MANUFACTURING CORPORATIONInventor: Chitoshi Miki
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Patent number: 11402403Abstract: A vehicle detection method includes using a first sensor and a second sensor coupled to a structure to detect vibrations generated by one or more vehicles that have passed over the structure. Based on the vibrations detected by the first sensor, a first plurality of peaks are extracted, and based on the vibrations detected by the second sensor, a second plurality of peaks are extracted. Each of the first plurality of peaks and the second plurality of peaks corresponds to an axle of the one or more vehicles. The first plurality of peaks and the second plurality of peaks are then computed to determine a number of vehicles that have passed over the structure.Type: GrantFiled: December 11, 2019Date of Patent: August 2, 2022Assignee: Seiko Epson CorporationInventors: Chitoshi Miki, Hidehiko Sekiya, Keishi Omori
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Patent number: 11150263Abstract: Provided is a measurement device including a data acquisition unit that acquires a data stream obtained in time series by a first sensor provided in a structure, and representing impact given to the structure by a movement of a moving object, and a processing unit that obtains a covariance based on the data stream and detects a timing of the impact given to the structure by the movement of the moving object, based on the covariance.Type: GrantFiled: December 12, 2019Date of Patent: October 19, 2021Assignee: Seiko Epson CorporationInventors: Chitoshi Miki, Hidehiko Sekiya, Yoshihiro Kobayashi
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Patent number: 11078636Abstract: A display device displays displacement of a bridge serving as a structure on a display part in the form of image information that is visually recognizable, based on a displacement amount of the bridge, the displacement amount having been calculated based on an output signal output from an acceleration detector serving as a physical quantity sensor provided on the bridge.Type: GrantFiled: June 11, 2019Date of Patent: August 3, 2021Inventors: Hiroshi Okamoto, Kazuyoshi Takeda, Makoto Sakurai, Hidehiko Sekiya, Chitoshi Miki
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Patent number: 10919050Abstract: Accurate measurement of acceleration caused by imbalance in the balance of a rotor is realized even in high-speed rotation with an acceleration sensor which has a processing speed required in low-speed rotation and a control unit. A centrifuge according to the present invention includes a rotor, a drive source for rotating the rotor, a rotating shaft for coupling the rotor and the drive source, an acceleration sensor, and a control unit. The acceleration sensor outputs values indicating acceleration in two different directions which are perpendicular to an axial direction of the rotating shaft. The control unit obtains an acceleration corresponding value, which is a value corresponding to acceleration in a direction perpendicular to the axial direction of the rotating shaft, based on values indicating acceleration in the two different directions and stops rotation of the rotor in a case where the acceleration corresponding value satisfies a determination criteria.Type: GrantFiled: July 26, 2016Date of Patent: February 16, 2021Assignee: KUBOTA MANUFACTURING CORPORATIONInventors: Yuya Takahashi, Chitoshi Miki
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Publication number: 20200384483Abstract: Damage caused by displacement of a rotating shaft is prevented with an acceleration sensor. A centrifuge according to the present invention includes a rotor, a driving source that rotates the rotor, a rotating shaft that links the rotor with the driving source, an acceleration sensor, and a control unit. The acceleration sensor outputs a value indicating acceleration in at least two different directions which are orthogonal to an axial direction of the rotating shaft. The control unit obtains a displacement conversion value corresponding to a value, which is obtained by dividing a value which is proportional to acceleration based on a value indicating acceleration and outputted by the acceleration sensor, by a value which is proportional to a square of an angular velocity of the rotor, and stops rotation of the rotor when the displacement conversion value satisfies a displacement determination criterion which is predetermined and indicates that displacement is large.Type: ApplicationFiled: January 10, 2019Publication date: December 10, 2020Applicant: KUBOTA MANUFACTURING CORPORATIONInventor: Chitoshi MIKI
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Publication number: 20200191825Abstract: A vehicle detection method includes acquiring a first output and a second output, detecting peaks and detection times from the first output, detecting peaks and detection times from the second output, extracting first peaks for one vehicle, extracting second peaks for the one vehicle, comparing the number n of the first peaks with the number m of the second peaks, and when the number n and the number m are different from each other, creating nCm or mCn combinations of the peaks, calculating differences between detection times of the plurality of first peaks and detection times of the plurality of second peaks in order of the detection times for each of the combinations, calculating variance values of the differences, and selecting a combination of the peaks having the smallest variance value.Type: ApplicationFiled: December 11, 2019Publication date: June 18, 2020Inventors: Chitoshi MIKI, Hidehiko SEKIYA, Keishi OMORI
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Publication number: 20200191824Abstract: Provided is a measurement device including a data acquisition unit that acquires a data stream obtained in time series by a first sensor provided in a structure, and representing impact given to the structure by a movement of a moving object, and a processing unit that obtains a covariance based on the data stream and detects a timing of the impact given to the structure by the movement of the moving object, based on the covariance.Type: ApplicationFiled: December 12, 2019Publication date: June 18, 2020Inventors: Chitoshi MIKI, Hidehiko SEKIYA, Yoshihiro KOBAYASHI
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Publication number: 20190376243Abstract: A display device displays displacement of a bridge serving as a structure on a display part in the form of image information that is visually recognizable, based on a displacement amount of the bridge, the displacement amount having been calculated based on an output signal output from an acceleration detector serving as a physical quantity sensor provided on the bridge.Type: ApplicationFiled: June 11, 2019Publication date: December 12, 2019Inventors: Hiroshi OKAMOTO, Kazuyoshi TAKEDA, Makoto SAKURAI, Hidehiko SEKIYA, Chitoshi MIKI
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Publication number: 20190134646Abstract: Accurate measurement of acceleration caused by imbalance in the balance of a rotor is realized even in high-speed rotation with an acceleration sensor which has a processing speed required in low-speed rotation and a control unit. A centrifuge according to the present invention includes a rotor, a drive source for rotating the rotor, a rotating shaft for coupling the rotor and the drive source, an acceleration sensor, and a control unit. The acceleration sensor outputs values indicating acceleration in two different directions which are perpendicular to an axial direction of the rotating shaft. The control unit obtains an acceleration corresponding value, which is a value corresponding to acceleration in a direction perpendicular to the axial direction of the rotating shaft, based on values indicating acceleration in the two different directions and stops rotation of the rotor in a case where the acceleration corresponding value satisfies a determination criteria.Type: ApplicationFiled: July 26, 2016Publication date: May 9, 2019Applicant: KUBOTA MANUFACTURING CORPORATIONInventors: Yuya TAKAHASHI, Chitoshi MIKI